Geoff Busby: Britain Year List 2021 BOU, All records: Top Blockers Record(s) 1 to 196 of 196 total. Seq. Species Scientific Name Seen By Other Listers Other Listers (%) 1 Brent Goose Branta bernicla 359 76.55 2 Canada Goose Branta canadensis 460 98.08 3 Barnacle Goose Branta leucopsis 322 68.66 4 Greylag Goose Anser anser 449 95.74 5 Pink-footed Goose Anser brachyrhynchus 357 76.12 6 Mute Swan Cygnus olor 461 98.29 7 Whooper Swan Cygnus cygnus 310 66.10 8 Egyptian Goose Alopochen aegyptiaca 370 78.89 9 Shelduck Tadorna tadorna 441 94.03 10 Mandarin Duck Aix galericulata 310 66.10 11 Garganey Spatula querquedula 282 60.13 12 Shoveler Spatula clypeata 444 94.67 13 Gadwall Mareca strepera 442 94.24 14 Wigeon Mareca penelope 442 94.24 15 Mallard Anas platyrhynchos 461 98.29 16 Pintail Anas acuta 390 83.16 17 Teal Anas crecca 445 94.88 18 Red-crested Pochard Netta rufina 170 36.25 19 Pochard Aythya ferina 426 90.83 20 Ring-necked Duck Aythya collaris 190 40.51 21 Tufted Duck Aythya fuligula 457 97.44 22 Scaup Aythya marila 244 52.03 23 Common Scoter Melanitta nigra 347 73.99 24 Goldeneye Bucephala clangula 383 81.66 25 Smew Mergellus albellus 159 33.90 26 Goosander Mergus merganser 390 83.16 27 Red-breasted Merganser Mergus serrator 324 69.08 28 Ruddy Duck Oxyura jamaicensis 35 7.46 29 Grey Partridge Perdix perdix 294 62.69 30 Pheasant Phasianus colchicus 454 96.80 31 Red-legged Partridge Alectoris rufa 400 85.29 32 Swift Apus apus 430 91.68 33 Cuckoo Cuculus canorus 382 81.45 34 Rock Dove (Feral Pigeon) Columba livia 403 85.93 35 Stock Dove Columba oenas 416 88.70 36 Woodpigeon Columba palumbus 463 98.72 37 Collared Dove Streptopelia decaocto 453 96.59 38 Water Rail Rallus aquaticus 353 75.27 39 Moorhen Gallinula chloropus 458 97.65 40 Coot Fulica atra 456 97.23 41 Crane Grus grus 199 42.43 42 Little Grebe Tachybaptus ruficollis 443 94.46 43 Red-necked Grebe Podiceps grisegena 141 30.06 44 Great Crested Grebe Podiceps cristatus 447 95.31 45 Black-necked Grebe Podiceps nigricollis 255 54.37 46 Oystercatcher Haematopus ostralegus 448 95.52 47 Avocet Recurvirostra avosetta 394 84.01 48 Grey Plover Pluvialis squatarola 343 73.13 49 Golden Plover Pluvialis apricaria 389 82.94 50 Ringed Plover Charadrius hiaticula 399 85.07 51 Little Ringed Plover Charadrius dubius 360 76.76 52 Lapwing Vanellus vanellus 453 96.59 53 White-tailed Plover Vanellus leucurus 200 42.64 54 Eurasian Whimbrel Numenius phaeopus 349 74.41 55 Curlew Numenius arquata 436 92.96 56 Bar-tailed Godwit Limosa lapponica 368 78.46 57 Black-tailed Godwit Limosa limosa 411 87.63 58 Long-billed Dowitcher Limnodromus scolopaceus 42 8.96 59 Snipe Gallinago gallinago 413 88.06 60 Grey Phalarope Phalaropus fulicarius 114 24.31 61 Common Sandpiper Actitis hypoleucos 397 84.65 62 Green Sandpiper Tringa ochropus 351 74.84 63 Redshank Tringa totanus 434 92.54 64 Spotted Redshank Tringa erythropus 331 70.58 65 Greenshank Tringa nebularia 382 81.45 66 Turnstone Arenaria interpres 411 87.63 67 Knot Calidris canutus 349 74.41 68 Ruff Calidris pugnax 369 78.68 69 Curlew Sandpiper Calidris ferruginea 259 55.22 70 Long-toed Stint Calidris subminuta 128 27.29 71 Sanderling Calidris alba 369 78.68 72 Dunlin Calidris alpina 418 89.13 73 Purple Sandpiper Calidris maritima 265 56.50 74 Little Stint Calidris minuta 290 61.83 75 Caspian Tern Hydroprogne caspia 54 11.51 76 Black Tern Chlidonias niger 167 35.61 77 Arctic Tern Sterna paradisaea 290 61.83 78 Common Tern Sterna hirundo 407 86.78 79 Sandwich Tern Thalasseus sandvicensis 372 79.32 80 Elegant Tern Thalasseus elegans 84 17.91 81 Little Gull Hydrocoloeus minutus 281 59.91 82 Kittiwake Rissa tridactyla 382 81.45 83 Bonaparte's Gull Chroicocephalus philadelphia 107 22.81 84 Black-headed Gull Chroicocephalus ridibundus 460 98.08 85 Mediterranean Gull Ichthyaetus melanocephalus 366 78.04 86 Common Gull Larus canus 418 89.13 87 Herring Gull Larus argentatus 457 97.44 88 Great Black-backed Gull Larus marinus 433 92.32 89 Lesser Black-backed Gull Larus fuscus 448 95.52 90 Puffin Fratercula arctica 305 65.03 91 Black Guillemot Cepphus grylle 206 43.92 92 Razorbill Alca torda 377 80.38 93 Common Guillemot Uria aalge 387 82.52 94 Red-throated Diver Gavia stellata 330 70.36 95 Pacific Diver Gavia pacifica 30 6.40 96 Great Northern Diver Gavia immer 287 61.19 97 Black-browed Albatross Thalassarche melanophris 200 42.64 98 Fulmar Fulmarus glacialis 389 82.94 99 Manx Shearwater Puffinus puffinus 246 52.45 100 Gannet Morus bassanus 405 86.35 101 Cormorant Phalacrocorax carbo 457 97.44 102 Shag Gulosus aristotelis 370 78.89 103 Glossy Ibis Plegadis falcinellus 213 45.42 104 Spoonbill Platalea leucorodia 335 71.43 105 Bittern Botaurus stellaris 294 62.69 106 Little Egret Egretta garzetta 444 94.67 107 Great White Egret Ardea alba 387 82.52 108 Grey Heron Ardea cinerea 454 96.80 109 Osprey Pandion haliaetus 294 62.69 110 Sparrowhawk Accipiter nisus 443 94.46 111 Marsh Harrier Circus aeruginosus 406 86.57 112 Red Kite Milvus milvus 434 92.54 113 Buzzard Buteo buteo 457 97.44 114 Barn Owl Tyto alba 371 79.10 115 Little Owl Athene noctua 281 59.91 116 Short-eared Owl Asio flammeus 262 55.86 117 Tawny Owl Strix aluco 364 77.61 118 Hoopoe Upupa epops 92 19.62 119 Kingfisher Alcedo atthis 410 87.42 120 Wryneck Jynx torquilla 108 23.03 121 Lesser Spotted Woodpecker Dryobates minor 117 24.95 122 Great Spotted Woodpecker Dendrocopos major 443 94.46 123 Green Woodpecker Picus viridis 395 84.22 124 Kestrel Falco tinnunculus 453 96.59 125 Hobby Falco subbuteo 347 73.99 126 Peregrine Falco peregrinus 421 89.77 127 Red-backed Shrike Lanius collurio 122 26.01 128 Jay Garrulus glandarius 447 95.31 129 Magpie Pica pica 460 98.08 130 Chough Pyrrhocorax pyrrhocorax 194 41.36 131 Jackdaw Coloeus monedula 459 97.87 132 Rook Corvus frugilegus 453 96.59 133 Carrion Crow Corvus corone 460 98.08 134 Hooded Crow Corvus cornix 193 41.15 135 Raven Corvus corax 415 88.49 136 Coal Tit Periparus ater 446 95.10 137 Marsh Tit Poecile palustris 318 67.80 138 Blue Tit Cyanistes caeruleus 463 98.72 139 Great Tit Parus major 461 98.29 140 Bearded Tit Panurus biarmicus 299 63.75 141 Skylark Alauda arvensis 440 93.82 142 Sand Martin Riparia riparia 426 90.83 143 Swallow Hirundo rustica 437 93.18 144 House Martin Delichon urbicum 432 92.11 145 Cetti's Warbler Cettia cetti 387 82.52 146 Long-tailed Tit Aegithalos caudatus 453 96.59 147 Willow Warbler Phylloscopus trochilus 415 88.49 148 Chiffchaff Phylloscopus collybita 441 94.03 149 Sedge Warbler Acrocephalus schoenobaenus 413 88.06 150 Blyth's Reed Warbler Acrocephalus dumetorum 43 9.17 151 Reed Warbler Acrocephalus scirpaceus 399 85.07 152 River Warbler Locustella fluviatilis 128 27.29 153 Grasshopper Warbler Locustella naevia 264 56.29 154 Blackcap Sylvia atricapilla 437 93.18 155 Garden Warbler Sylvia borin 343 73.13 156 Lesser Whitethroat Curruca curruca 332 70.79 157 Whitethroat Curruca communis 421 89.77 158 Goldcrest Regulus regulus 427 91.04 159 Wren Troglodytes troglodytes 458 97.65 160 Nuthatch Sitta europaea 431 91.90 161 Treecreeper Certhia familiaris 420 89.55 162 Starling Sturnus vulgaris 458 97.65 163 Song Thrush Turdus philomelos 454 96.80 164 Mistle Thrush Turdus viscivorus 437 93.18 165 Redwing Turdus iliacus 443 94.46 166 Blackbird Turdus merula 462 98.51 167 Fieldfare Turdus pilaris 422 89.98 168 Ring Ouzel Turdus torquatus 261 55.65 169 Spotted Flycatcher Muscicapa striata 330 70.36 170 Robin Erithacus rubecula 462 98.51 171 Pied Flycatcher Ficedula hypoleuca 286 60.98 172 Redstart Phoenicurus phoenicurus 335 71.43 173 Whinchat Saxicola rubetra 302 64.39 174 Stonechat Saxicola rubicola 432 92.11 175 Wheatear Oenanthe oenanthe 409 87.21 176 Tree Sparrow Passer montanus 328 69.94 177 House Sparrow Passer domesticus 458 97.65 178 Dunnock Prunella modularis 462 98.51 179 Yellow Wagtail Motacilla flava 368 78.46 180 Grey Wagtail Motacilla cinerea 440 93.82 181 Pied Wagtail Motacilla alba 460 98.08 182 Meadow Pipit Anthus pratensis 434 92.54 183 Tree Pipit Anthus trivialis 307 65.46 184 Rock Pipit Anthus petrosus 372 79.32 185 Chaffinch Fringilla coelebs 457 97.44 186 Brambling Fringilla montifringilla 310 66.10 187 Bullfinch Pyrrhula pyrrhula 429 91.47 188 Greenfinch Chloris chloris 453 96.59 189 Linnet Linaria cannabina 437 93.18 190 Lesser Redpoll Acanthis cabaret 341 72.71 191 Common Crossbill Loxia curvirostra 263 56.08 192 Goldfinch Carduelis carduelis 454 96.80 193 Siskin Spinus spinus 414 88.27 194 Snow Bunting Plectrophenax nivalis 254 54.16 195 Yellowhammer Emberiza citrinella 407 86.78 196 Reed Bunting Emberiza schoeniclus 439 93.60